16f88 to parallax 2x16 lcd

[rdxbam]

to get a small test picbasic program to write to this LCD, what port/pin should one use on the 16f88? this LCD has on a Rx pin to receive data. i was thinking the pin would be RB5/PORTB.5.

would that be correct?

[mackrackit]

You can use just about any pin as long as it is not configured for analog for the serial output.

[rdxbam]

ok, thanks!

[rdxbam]

should this code work to get the parallax to display a string?




'===============================
'' pic16f88

INCLUDE "modedefs.bas"


'DEFINE OSC 10 ' 4MHz doesn't work try others

TRISB = %00000000 ' PORTB all outputs
ADCON1 = %00000111 ' Disable A/D converter
ANSEL = %00000000 ' all analog pins to digital

'================================

PinOut VAR PORTB.5 ' Tx on RB5
Led3On VAR PORTB.3 ' turn on LED if Tx

'================================

BAUD con 16780 ' 2400 Baud, inverted, NoParity: conservative for testing

'================================
PinOut = 0 ' set to a norm state
PAUSE 100 ' a little wait time

HIGH PinOut
HIGH Led3On

Pause 5000 ' LCD start up delay
SEROUT2 PinOut, BAUD,["STR-1 012345678",13,10]
LOW Led3On
PAUSE 5000

'================================

Loop:

HIGH Led3On
SEROUT2 PinOut, BAUD, ["STR-2 012345678",13,10]
PAUSE 5000
LOW Led3On
SEROUT2 PinOut, BAUD, ["STR-3 012345678",13,10]
goto Loop

END

[mackrackit]

No, you are missing a bit here and there. Serial LCDs have their own command set. I went to this page and think these are the ones for you.
http://www.parallax.com/Store/Access...%2cProductName

LcdBkSpc        CON     $08             ' move cursor left
LcdRt           CON     $09             ' move cursor right
LcdLF           CON     $0A             ' move cursor down 1 line
LcdCls          CON     $0C             ' clear LCD (use PAUSE 5 after)
LcdCR           CON     $0D             ' move pos 0 of next line
LcdBLon         CON     $11             ' backlight on
LcdBLoff        CON     $12             ' backlight off
LcdOff          CON     $15             ' LCD off
LcdOn1          CON     $16             ' LCD on; cursor off, blink off
LcdOn2          CON     $17             ' LCD on; cursor off, blink on
LcdOn3          CON     $18             ' LCD on; cursor on, blink off
LcdOn4          CON     $19             ' LCD on; cursor on, blink on
LcdLine1        CON     $80             ' move to line 1, column 0
LcdLine2        CON     $94             ' move to line 2, column 0
LcdCC0          CON     $F8             ' define custom char 0
LcdCC1          CON     $F9             ' define custom char 1
LcdCC2          CON     $FA             ' define custom char 2
LcdCC3          CON     $FB             ' define custom char 3
LcdCC4          CON     $FC             ' define custom char 4
LcdCC5          CON     $FD             ' define custom char 5
LcdCC6          CON     $FE             ' define custom char 6
LcdCC7          CON     $FF             ' define custom char 7

This should work.

SEROUT2 PinOut, BAUD,[LcdBLoff, LcdOn1, LcdCls]
SEROUT2 PinOut, BAUD,["HELLO WORLD"]

Try a test program with all of the above.

[rdxbam]

thanks for the tip. i dl'd two of the code samples from that page, mixed and matched and it still didn't work. i looked too at the melabs pages for the diff's of BS2 and PBP, just in case. but i did get it to work ,,,

0. without setting the values for these, OSC and OSCCON, could not get anything written to the LCD. i set them for 8MHz, as 4MHz would not work. so i looked at section 4.6.1 of the datasheet and set the following...

DEFINE OSC 8
OSCCON= %01110100 ' internal RTC Oscillator freq select
' [bits 6-4 = 8MHz], [bit 2] INTOSC freq stable bit set

1. configuration was set as HS, WDT_ON, PWRT_ON, BOD_ON, MCLR_OFF, PROTECT_OFF

2. the baud rate set using these values, "396 or 16780" didn't work for me. but t2400 does.

thanks for your help!!!!